CVE-2026-40553 | Buffer overflow vulnerability has been found in "extension/r… | CVSS 5.1 MEDIUM

Description

Buffer overflow vulnerability has been found in "extension/readdir.c" program file of gawk (ftype() routine). This issue could be used to crash the program and potentially to achieve code execution, although the latter has not been confirmed to be feasible. It affects gawk in versions 5.4.0 and below.

Metadata

CVE ID: CVE-2026-40553
State: PUBLISHED
Assigner: CERT-PL
Reserved: 2026-04-14 09:44 UTC
Published: 2026-07-13 12:07 UTC
Last updated: 2026-07-13 13:00 UTC
Primary CWE: CWE-121
CWE-121 Stack-based Buffer Overflow
Vendor / Product: GNU / gawk
Sources: cve.org · NVD

Severity & Metrics

5.1 MEDIUM CVSS 4.0

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:L/SI:L/SA:L

SSVC — CISA Coordinator

Exploitation: none
Automatable: no
Tech. Impact: partial

Affected products (1)

Vendor	Product	Platform	Versions
GNU	gawk	—	0 ≤ 5.4.0

Weakness (CWE)

CWE	Source	Description
CWE-121	cna	CWE-121 Stack-based Buffer Overflow

CVSS scores (1)

Score	Severity	Version	Source	Vector
5.1	MEDIUM	4.0	cna	CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:L/SI:L/SA:L

References (2)